The G Loomis walleye series rods are not the same class as the Avid. It would be similar to comparing a Legend Extreme to an Avid. The G Loomis walleye rods (the current models) are built on the IMX blanks I believe. The previous walleye series were the GL2 blanks I think. Can’t remember for sure, but I think that is it. I own many avids, a legend tournament, a legend extreme, the old G Loomis walleye, and have fished with the newer version.
If you try to compare apples to apples, or at least as close as you can, I liked the Legend Extreme better than the IMX walleye rod mainly just off weight. They both have fantastic feel.
The GL2 walleye series compares very closely to the legend tournament and I think they fish pretty similar.
If you are picking between a G Loomis walleye and an Avid, I would say go G Loomis because you are stepping up in sensitivity levels.
Just as a disclaimer, I am sitting in a meeting and wrote this all from memory. I could have gotten some stuff wrong due to not validating my facts.